Inline Fuse Holders GF/038P fuse blocks

Cái inline fuse holder for 10.3×38mm cartridge fuses is a heavy-duty high-voltage wiring-type circuit protection component. This inline fuse holder adopts high-temperature phenolic resin housing paired with high-conductivity threaded terminals, delivering stable electrical connection and reliable overcurrent protection for high-voltage AC and DC circuits. With threaded wiring structure and customizable wire gauge, it is widely used in industrial power systems, solar photovoltaic, energy storage equipment and high-voltage power distribution units, featuring excellent flame retardancy, high voltage withstand performance and stable long-term operation.

Core Features of 10x38mm Inline Fuse Block

• Compatible with standard 10.3×38mm cylindrical cartridge fuses, covering common high-voltage fuse specifications
• Wide voltage range: supports 250V, 500V and 1000V circuit applications, strong versatility
• Rated current up to 50A, suitable for medium and high current high-voltage circuit protection
• Housing material: Phenolic resin, UL94 V0 flame retardant grade, excellent high temperature and arc resistance
• Threaded connection design, firm wiring, reliable contact, suitable for harness series installation
• Customizable wire gauge: matching different wire diameters according to different current ratings, supporting customized harness solutions
• Excellent insulation performance, high voltage withstand capacity, safe and reliable for high-voltage scenarios
• RoHS compliant, suitable for global industrial and new energy electronic product applications

Compared with ordinary low-voltage automotive inline fuse holders, this high-voltage phenolic resin model has significantly higher voltage withstand and flame retardant performance, and can adapt to more demanding industrial and new energy high-voltage working environments. Its inline series structure can be directly connected to the wiring harness at any position, with high flexibility in installation and layout, and is the preferred protection scheme for high-voltage DC and AC circuit harnesses.

Main Technical Specifications

Selection & Wire Gauge Guide

When selecting an inline fuse holder, first confirm the system rated voltage, working current and wire gauge of the circuit. For high-voltage scenarios above 500V, phenolic resin models with sufficient voltage withstand rating must be selected to avoid insulation breakdown risks. Select a 10x38mm fuse with appropriate current rating according to the actual load, and reserve a 1.25-1.5 times safety margin to avoid overheating under long-term operation. Different current ratings correspond to different wire diameters, and we can provide customized wiring harness solutions according to your project requirements. For high-temperature and high-humidity industrial environments, phenolic resin housing models are recommended for better aging resistance and longer service life.

Application Scenarios

• Industrial power supplies, high-voltage power modules and power distribution equipment
• Solar photovoltaic systems and PV combiner box circuit protection
• Battery energy storage systems and BMS auxiliary circuit protection
• High-voltage DC power supply and test equipment
• Charging piles and new energy auxiliary power systems
• Telecom base stations and communication power equipment
• Industrial automation control cabinets and high-voltage distribution units

Installation & Usage Notes

1. Cut off the power supply before installation to ensure safe operation and avoid electric shock and short circuit risks.

2. Strip the insulation layer at both ends of the circuit wire, and connect them to the threaded terminals at both ends of the fuse holder respectively.

3. Tighten the threaded terminals firmly to ensure sufficient contact area and avoid overheating caused by loose connections.

4. Select a 10.3×38mm cartridge fuse with appropriate current and voltage rating according to the circuit protection requirements, and put it into the holder completely.

5. Tighten the end cover of the fuse holder to ensure the protection and insulation performance of the housing.

6. Restore the power supply and test whether the protected circuit works normally to confirm the installation is correct.

7. Regularly check the terminals and fuse for looseness, oxidation and overheating signs, and replace them in time if any abnormality is found.

Frequently Asked Questions

Q1: What size of fuse does this inline fuse holder fit?

A1: It is compatible with standard 10.3×38mm cylindrical cartridge fuses, which is a common specification for medium and high current high-voltage circuit protection.

Q2: What are the rated voltage and current of this fuse holder?

A2: The maximum rated current is 50A, and it supports 250V, 500V and 1000V voltage levels, covering most industrial and new energy high-voltage application scenarios.

Q3: What material is the housing made of?

A3: The housing is made of phenolic resin with UL94 V0 flame retardant grade, featuring excellent high temperature resistance, arc resistance and insulation performance, suitable for high-voltage working environments.

Q4: What connection method does this fuse holder use?

A4: It adopts threaded connection design, which can be directly connected in series to the circuit wiring harness, with firm wiring and reliable contact, suitable for inline harness installation.

Q5: Can the wire gauge be customized?

A5: Yes, we can match different wire diameters according to different current ratings, and provide customized wiring harness solutions according to your specific project requirements.

Q6: What are the main application scenarios?

A6: Widely used in industrial power supplies, solar photovoltaic systems, energy storage equipment, charging piles, test instruments and various high-voltage AC and DC circuit overcurrent protection.

Q7: Does this product have flame retardant certification?

A7: Yes, the housing material meets UL94 V0 flame retardant standard, and the product is fully RoHS compliant, meeting the safety and environmental requirements of global major markets.